Automatic flush actuation apparatus

ABSTRACT

An automatic flush actuation apparatus, which is incorporated with a flushing system having a water inlet, a water outlet, and a water chamber communicating therebetween, that includes a valve member being moved by a flush lever for releasing the water pressure within the water chamber to allow the water passing from the water inlet to the water outlet, and a sensor-operated powering assembly including a relief valve provided at the valve member for controlling the water flowing to the water outlet and an actuator arranged in such a manner that while sensing a presence of a user of the flushing system, the actuator is driven to move the relief valve to an opened position for releasing the water pressure within the water chamber to allow the water passing to said water outlet.

BACKGROUND OF THE PRESENT INVENTION

[0001] 1. Field of Invention

[0002] The present invention relates to a toilet and urinal facility,and more particularly to an automatic flush actuation apparatus which iscapable of incorporating with a conventional commercial manual restroomflushing system, such as urinal and water closet, so as to selectivelyoperate the automatic flush actuation apparatus automatically throughthe use of a sensor or normally through an actuation lever.

[0003] 2. Description of Related Arts

[0004] Manual operated toilet room flush valves for use on urinals andwater closets in public restrooms are well known. As shown in FIG. 1, aconventional manual operated automatic flush actuation apparatuscomprises a valve body A1 having a water inlet A11 and a water outletA12, a diaphragm A2 having a water channel A21 communicating between thewater inlet A11 and the water outlet A12, a relief valve A3 disposed atthe diaphragm A2 for blocking the water flowing from the water inlet A11to the water outlet A12 through the water channel A21, and a flush leverA4 arranged to move the relief valve A3 at a position that the water isallowed to flow to the water outlet A12 for completing the flushingoperation.

[0005] For hygiene purposes, an automatic operated toilet room flushvalve is developed. For example, U.S. Pat. Nos. 5,169,118 and 5,244,179disclose a solenoid operated automatic flush valve which isbattery-operated and utilizes a latching solenoid to limit power drainon the battery. Accordingly, when the infrared sensor detects thepresence of a user of a urinal or toilet, the flush valve isautomatically driven to open to complete the flushing operation.However, the flush valves, according to the above patents, have severalcommon drawbacks.

[0006] The presence of the user sensed by the infrared sensor will causethe solenoid to move the diaphragm to a valve open position. It is knownthat the solenoid is made of a number of circular wire loops to generatea magnetic force when an electric current is passed through the wireloops. The solenoid may come in contact with water such that thesolenoid may accumulate rusting particles from the water, which mayremain on the solenoid. It is one of the common problems to cause afailure of operation of the flush valve. In other words, theconventional manual operated flush valve is more reliable than thesolenoid operated automatic flush valve. Thus, the maintenance cost ofthe solenoid operated automatic flush valve is higher than that of theconventional manual operated flush valve.

[0007] In addition, the structural design of the solenoid operatedautomatic flush valve is different from that of the manual operatedflush valve. In other words, when the flushing system is incorporatedwith the solenoid operated automatic flush valve, the flushing systemwill lose the mechanical-manual operated feature. Therefore, there is noalternative to operate the flushing cycle when the solenoid operatedautomatic flush valve has failed to operate.

[0008] In order to install the solenoid operated automatic flush valveinto the conventional flushing system, the mechanical-manual operatingmechanism of the flush valve must be totally removed, which is a wasteof resources in order to incorporated with the solenoid operatedautomatic flush valve.

[0009] The configuration of the solenoid operated automatic flush valveis complicated, wherein once the solenoid is broken or the battery isdead, the facility should call a technician to open an outer cover anddisassemble an inner cover for the replacement of the solenoid or thebattery. Due to the complicated structure of the solenoid operatedautomatic flush valve, the solenoid operated automatic flush valverequires a skilled technician to replace the broken solenoid and/or evenreplace the battery, which may further increase the maintenance cost ofthe infrared operated automatic flush valve.

SUMMARY OF THE PRESENT INVENTION

[0010] A main object of the present invention is to provide an automaticflush actuation apparatus which is capable of incorporating with aconventional commercial manual restroom flushing system, such as urinaland water closet, so as to automatically operate the flush valve throughthe use of a sensor.

[0011] Another object of the present invention is to provide anautomatic flush actuation apparatus without altering the originalstructural design of the manual operated flush valve in order toincorporate with the present invention. Therefore, the user is able tomechanically-manually operate the flushing cycle for the restroomflushing system if the automatic operation system is not functioningproperly.

[0012] Another object of the present invention is to provide anautomatic flush actuation apparatus which is reliable and that can beeasily installed and maintained.

[0013] Another object of the present invention is to provide anautomatic flush actuation apparatus, wherein a covering cap has abattery opening that allows a power source exposing to outside.Therefore, any individual is able to simply replace the power sourcewithout detaching the covering cap from the flushing system, so as toreduce the maintenance cost of the present invention.

[0014] Another object of the present invention is to provide anautomatic flush actuation apparatus, wherein the covering cap furtherhas a sensor opening that allows a CPU exposing to outside. Therefore,any individual is able to make adjustments via the sensor switch throughthe CPU opening without detaching the covering cap from the flushingsystem.

[0015] Another object of the present invention is to provide anautomatic flush actuation apparatus, which is powered by an electricmotor so as to avoid water damage and to enhance performance andreliability.

[0016] Another object of the present invention is to provide anautomatic flush actuation apparatus, which provides an economic andefficient solution for incorporating with the conventional manualoperated flushing system in a simple and economical way.

[0017] Accordingly, in order to accomplish the above objects, thepresent invention provides an automatic flush actuation apparatus for aflushing system which comprises a valve body having a water inlet, awater outlet and a water chamber communicating therebetween, a valveseat, having a flush channel, normally sealed with the water chamber anddisposed between the water inlet and the water outlet for retaining apredetermined water pressure within the water chamber so as to blockwater flowing from the water inlet to the water outlet, and a flushlever coupled with the valve body, wherein the flush valve comprises:

[0018] a valve member adapted for being disposed at the valve seat tocontrol the water flowing from the water inlet to the water outlet,wherein the valve member is capable of being moved by the flush leverbetween a manual-operated closed position and a manual-operated openedposition, wherein at the manual-operated closed position, the valvemember is arranged for sealedly sitting at the valve seat to block thewater from passing through the water outlet, and at the manual-operatedopened position, the valve member is moved to an opened position forreleasing the water pressure within the water chamber to allow the waterto pass from the water inlet to the water outlet through the waterchamber; and

[0019] a sensor-operated powering assembly, comprising:

[0020] a housing, which is adapted for mounting on the valve body;

[0021] a replaceable power source received in the housing;

[0022] a CPU electrically connected with the power source for sensing apresence of a user of the flushing system, so as to active the powergenerator;

[0023] a power generator electrically connected to the CPU;

[0024] a relief valve provided at the valve member for controlling thewater flowing from the water inlet to the water outlet through the waterchamber; and

[0025] an actuator driven by the power generator to move the reliefvalve between an auto-operated closed position and an auto-operatedopened position, wherein at the auto-operated closed position, therelief valve is sealedly closed for blocking the water passing to thewater outlet, and at the auto-operated opened position, the relief valveis moved to an opened position by the actuator for releasing the waterpressure within the water chamber to allow the water passing to thewater outlet.

[0026] These and other objectives, features, and advantages of thepresent invention will become apparent from the following detaileddescription, the accompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

[0027]FIG. 1 is a sectional view of a conventional manual operatedflushing system.

[0028]FIG. 2 is a sectional view of an automatic flush actuationapparatus according to a preferred embodiment of the present invention.

[0029]FIGS. 3A and 3B illustrate a manual operation of the flushingcycle for the automatic flush actuation apparatus according to the abovepreferred embodiment of the present invention.

[0030]FIGS. 4A and 4B illustrates an automatic sensor operation of theflushing cycle for the automatic flush actuation apparatus according tothe above preferred embodiment of the present invention.

[0031]FIG. 5 is an exploded perspective view of a sensor-operatedpowering device of the automatic flush actuation apparatus according tothe above preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0032] Referring to FIG. 2 of the drawings, an automatic flush actuationapparatus 2 for a flushing system 1 according to a preferred embodimentof the present invention is illustrated, wherein the automatic flushactuation apparatus 2 is capable of incorporating with a conventionalmanual operated flushing system to achieve both manual and automaticoperations to start a flushing cycle of the flushing system 1.

[0033] The flushing system 1, such as the conventional manual operatedflushing system, comprises a valve body 11 having a water inlet 111, awater outlet 112 and a water chamber 113 that is normally sealed betweenthe water inlet 111 and the water outlet 112, a valve seat 12, having aflush channel 121, disposed between the water inlet 111 and the wateroutlet 112 to block water flowing from the water inlet 111 to the wateroutlet 112, and a flush lever 13 coupled with the valve body 11.

[0034] The valve seat 12 comprises a diaphragm 122, having a bleed hole100, sealedly disposed in the valve body 11 in a movable manner todefine the water chamber 113 above the diaphragm 122 to communicatebetween the water inlet 111 and the water outlet 112. In other words,once the water within the water chamber 113 is released to reduce thewater pressure therein, the diaphragm 122 is forced to bend upwardly sothat the water is capable of passing from the water inlet 111 to thewater outlet 112 to complete the flushing cycle of the flushing system.

[0035] Accordingly, the water is flowed into the water chamber 113 fromthe water inlet 111 through the bleed hole 100 on the diaphragm 122 insuch a manner that the water within the water chamber 113 provides apredetermined water pressure against the diaphragm 122 to normally blockthe water flowing to the water outlet 112.

[0036] The automatic flush actuation apparatus 2 comprises a valvemember 20 and a sensor-operated powering assembly 40.

[0037] The valve member 20 is adapted for being disposed at the valveseat 12 to control the water flowing from the water inlet 111 to thewater outlet 112. The valve member 20 is capable of being moved by theflush lever 13 between a manual-operated closed position and amanual-operated opened position, wherein at the manual-operated closedposition, the valve member 20 is arranged for sealedly sitting at thevalve seat 12 to block the water passing to the water outlet 112, and atthe manual-operated opened position, the valve member 20 is moved to anopened position for releasing the water pressure within the waterchamber 113 through the flush channel 121 so as to allow the waterpassing from the water inlet 111 to the water outlet 112.

[0038] As shown in FIGS. 2 and 5, the sensor-operated powering assembly40 comprises a housing 41, which is adapted for mounting on the valvebody 11, having a power source compartment 411 and a CPU cavity 412, apower source 42 replaceably received in the power source compartment411, a power generator 43 electrically connected to the CPU 44, and theCPU 44 which is received in the CPU cavity 412 of the housing 41,electrically connected with the power source 42 for sensing a presenceof a user of the flushing system 1, so as to active the power generator43.

[0039] The sensor-operated powering assembly 40 further comprises arelief valve 30 provided at the valve member 20 for controlling thewater flowing from the water inlet 111 to the water outlet 112 throughthe water chamber 113 and an actuator 45 driven by the power generator43 to move the valve stopper 32 between an auto-operated closed positionand an auto-operated opened position.

[0040] Accordingly, at the auto-operated closed position, the reliefvalve 30 is sealedly closed for blocking the water passing to the wateroutlet 112, and at the auto-operated opened position, the valve stopper32 is moved to an opened position by the actuator 45 for releasing thewater pressure within the water chamber 113 to allow the water passingto the water outlet 112.

[0041] According to the preferred embodiment, the valve member 20comprises a sealing platform 22 arranged for sealedly supporting on thediaphragm 122 of the valve seat 12 to normally close the flush channel121 and a valve controlling shaft 23 downwardly extended from thesealing platform 22 for communicating with the flush lever 13 within theflush channel 121.

[0042] As shown in FIG. 3A, by actuating the flush lever 13, the valvecontrolling shaft 23 is pushed to drive the sealing platform 22 at aposition offset with respect to the diaphragm 122 such that the waterwithin the water chamber 113 is allowed to flow out through the flushchannel 121 and release the water pressure within the water chamber 113because the amount of water flowing out through the flush channel 121 ismuch larger than the amount of water flowing in through the bleed hole100. Thus, when the water pressure within the water chamber 113 reduces,the diaphragm 122 is pushed upwardly for allowing the water passing tothe water outlet 112, so as to start the flushing cycle of the flushingsystem 1 manually as the conventional manual-operated flushing system,as shown in FIG. 3B.

[0043] Once the flush lever 13 is returned back to its originalposition, the sealing platform 22 is forced to sealedly sit on thediaphragm 122 due to the water pressure so as to sealedly close theflush channel 121. Therefore, the diaphragm 122 is dropped down byrefilling the water back into the water chamber 113 to increase thewater pressure therein so as to sealedly close the water outlet 112 tostop the water passing thereto. It is worth to mention that since thesealing platform 22 is normally sealed on the diaphragm 122, no water isallowed to flow through the flush channel 121 to the water outlet 112until the flushing cycle is started.

[0044] The relief valve 30 has a water passage 31 axially extended alongthe valve member 20 for communicating the water chamber 113 with thewater outlet 112, and a valve stopper 32 disposed on the valve member 20to normally close the water passage 31 for controlling the water flowingfrom the water inlet 111 to the water outlet 112.

[0045] As shown in FIG. 2, the water passage 31 is coaxially extendedfrom the sealing platform 22 to a bottom end of the valve controllingshaft 23 for communicating the water chamber 113 with the water outlet112.

[0046] The valve stopper 32, having a ball-shape, sits on the sealingplatform 22 at an opening of the water passage 31 to normally close thewater passage 31 for blocking the water pressure releasing from thewater chamber 113. Accordingly, the sealing platform 22 has a circularretaining seat 221 protruding upwardly around the opening of the waterpassage 31 wherein the valve stopper 32 is disposed at the retainingseat 221 of the valve member 20 so as to hold the valve stopper 32 inposition. It is worth to mention that when the valve member 20 is movedbetween the manual-operated closed position and the manual-operatedopened position, the valve stopper 32 remains at the opening of thewater passage 31 to block the water passing the water outlet 112.

[0047] As shown in FIG. 5, the housing 41 comprises a supporting frame413 supported above the valve stopper 32 and a valve cap 414, having atransparent window 4141, adapted for detachably mounting on the valvebody 11 to protectively enclose the supporting frame 413, wherein thepower source 42, the power generator 43, and the CPU 44 are supported bythe supporting frame 413 and enclosed by the valve cap 414 while the CPU44 is capable of communicating with outside through the transparentwindow 4141.

[0048] According to the preferred embodiment, the power source 42comprises a battery replaceably disposed in the power source compartment411 to electrically connect with the CPU 44. It is worth to mention thatthe power source 42 can be used as an AC current to electrically pluginto an electric outlet for supplying electricity to the CPU 44.

[0049] The power generator 43, according to the preferred embodiment, isan electric motor electrically connected to the CPU 44 wherein the powergenerator 43 is actuated via the CPU 44 to drive the actuator 45 torotate. Accordingly, the power generator 43 can be a conventionalsolenoid electrically connected to the CPU 44 to drive the actuator 45so as to move the valve stopper 32 between the auto-operated closedposition and the auto-operated opened position. It is worth to mentionthat the electric motor is more reliable than the solenoid because theelectric motor provides simple mechanical work rather than using themagnetic force, so as to minimize the failure operation of the powergenerator 43 and to reduce the maintenance cost of the presentinvention.

[0050] The CPU 44 comprises a control processor 441 supported in thehousing 41 and a sensor 442 which is electrically connected to thecontrol processor 441 and aligned with the transparent window 4141 ofthe valve cap 414. Accordingly, the sensor 442 is an infrared sensorarranged to detect the presence of the user by means of infrared signalin such a manner that when the sensor 442 sends an infrared signalthrough the transparent window 4141 for detecting the presence of theuser of the flushing system, the control processor 441 is activates thepower generator 43 to actuate valve stopper 32 to open the relief valve30.

[0051] In addition, the control processor 441 is a control circuitry tocontrol the configuration of the flushing cycle wherein the controlprocessor 441 is adapted to control the time of the flushing cycle, thewater volume for each flushing cycle, the detecting range of the sensor442, and the motion of the electric motor of the power generator 43.Thus, a default configuration is preset in the control processor 441such that the automatic flush actuation apparatus of the presentinvention is capable of returning to its original settings through thecontrol processor 441. It is worth to mention that the control processor441 also controls the power of the power source 42 wherein when there isno sufficient power to actuate the power generator 43, the controlprocessor 441 will control the relief valve 30 to remain in the closedposition. In other words, only the manual operation of the flush lever13 is capable of starting the flushing cycle when the control processor441 stops the actuation of the relief valve 30.

[0052] The actuator 45 is rotatably extended from the power generator 43wherein the actuator 45 has a driving end portion 451 downwardly androtatably extended from a bottom side of the supporting frame 413 tocontact with the valve stopper 32. Accordingly, the driving end portion451 of the actuator 45, having a semi-circular cross section, has a flatcontacting surface 4511 and a curved contacting surface 4512, whereinthe driving end portion 451 of the actuator 45 is arranged to be drivento rotate via the power generator 43 to move the valve stopper 32 at theauto-operated closed position that the valve stopper 32 is contactedwith the flat contacting surface 4511 of the actuator 45 to retain thevalve stopper 32 at the opening of the water passage 31 for blocking thewater passing to the water outlet 112 as shown in FIG. 2, and to movethe valve stopper 32 at the auto-operated opened position that the valvestopper 32 is contacted with the curved contacting surface 4512 of theactuator 45 to move the valve stopper 32 to offset the opening of thewater passage 31 for allowing the water passing to the water outlet, asshown in FIG. 4A.

[0053] It is worth to mention that when the actuator 45 moves the valvestopper 32 away from the opening of the water passage 31, the waterwithin the water chamber 113 is allowed to flow out through the waterpassage 31 so as to reduce the water pressure within the water chamber113, as shown in FIG. 4A. Then, the diaphragm 122 is pushed upwardly forallowing the water flowing from the water inlet 111 to the water outlet112, as shown in FIG. 4B. Once the valve stopper 32 is moved back intoits original position to close the water passage 31, the diaphragm 122is dropped down by refilling the water back into the water chamber 113to increase the water pressure therein so as to sealedly close the wateroutlet 112 to stop the water passing thereto.

[0054] The sensor-operated flushing cycle of the flushing system 1 iscontrolled by the rotation of the actuator 45. Once the driving endportion 451 of the actuator 45 is rotated back to its original position,i.e. valve stopper 32 is contacted with the flat contacting surface 4511of the actuator 45, the valve stopper 32 is forced to sealedly sit onthe valve member 20 by means of water pressure to close the waterpassage 31. Therefore, the diaphragm 122 is dropped down by pressure tosealedly close the water outlet 112 to stop the water passing thereto.

[0055] It is worth to mention that the volume of water used in oneflushing cycle for the flushing system 1 can be controlled by the powergenerator 43 through the CPU 44 to control the rotational speed of theactuator 45. The volume of water used in each flushing cycle can beadjustably controlled by controlling the rotational cycle of theactuator 45, i.e. how long the actuator 45 drives the valve stopper 32to stay in the opened position and the closed position. In other words,the water volume of each flushing cycle will be increased when the CPU44 delays the rotational cycling time of the actuator 45.

[0056] Accordingly, w hen the valve stopper 32 is moved between theauto-operated closed position and the auto-operated opened position, thevalve member 20 is remained at its manual-operated closed position.Since the manual operation and the sensor operation employ withdifferent water pathways, i.e. the flush channel 121 and the waterpassage 31, the manual and sensor operations do not interrupt with eachother and function individually.

[0057] Therefore, to start the flushing cycle of the flushing system,the individual is able to either manually operate the flush lever 13 tomove the valve member 20 to an offset position so as to release thewater pressure through the flush channel 121 or automatically operatethe CPU 44 to move the valve stopper 32 to an offset position so thatthe water pressure is allowed to be released through the water passage31. In other words, even though the sensor-operated powering assembly 40fails to operate due to the battery, the individual is still able tocomplete the flushing cycle for the flushing system manually.

[0058] In order to securely hold the valve stopper 32 in position, thesupporting frame 413 of the housing 41 further comprises a locating ring415 integrally and downwardly protruded from the bottom side of thesupporting frame 413 to coaxially align with the water passage 31 so asto form as a boundary for the valve stopper 32 to move within thelocating ring 415. In other words, the locating ring 415 limits themovement of the valve stopper 32 to prevent the valve stopper 32 frombecoming dislocated on the valve member 20 and to guide the valvestopper 32 returning back to the opening of the water passage 31 aftercompleting the flushing cycle.

[0059] As shown in FIG. 5, the valve cap 414 further comprises an outercasing 4142 having a power source opening 4143 aligned with the powersource compartment 411 to expose the power source 42 to outside throughthe power source opening 4143 and a CPU opening 4144 aligned with theCPU cavity 412 to expose the CPU 44 to outside through the CPU opening4144, and a power source cover 4145 detachably mounted on the outercasing 4142 to cover the power source opening 4143, wherein thetransparent window 4141 is detachably mounted on the outer casing 4142to enclose the CPU 44 within the valve cap 414.

[0060] Therefore, an individual is able to replace the power source 42and to adjust the settings of the CPU 44 by detaching the power sourcecover 4145 and the transparent window 4141 respectively without removingthe entire valve cap 414 so as to simplify the replacement operation andadjustment of the present invention. It is worth to mention the valvecap 414, such as the conventional cap, is securely mounted on the valvebody 11 via a locking ring 400 such that the individual must use awrench to unscrew the locking ring 400 in order to detach the valve cap414. It is worth to mention that the locking ring 400 is arranged tosealedly mount the diaphragm 122 of the valve seat 12 on the valve body11 to prevent water leakage thereof. However, it would be inconvenientto replace the power source 42 and to adjust the CPU 44 if the valve cap414 must be detached from the valve body 11 and then sealedly attachedback onto the valve body 11. Thus, the water may leak to the outsidewhen the valve cap 414 is opened, especially if the valve cap 414 is notperfectly sealed onto the valve body 11.

[0061] In addition, the valve cap 414 further comprises a cover locker4146 provided on the outer casing 4142 to securely lock up the powersource cover 4145 and the transparent window 4141 to enclose the powersource opening 4143 and the CPU opening 4144 respectively. It is worthto mention that the locking and unlocking operation of the cover locker4146 is simply in comparison with the locking and unlocking operation ofthe valve cap 414, so as to provide a quick and easy replacementoperation of the present invention.

[0062] In comparison with the conventional manual operated flushingsystem, the conventional manual operated flushing system can keep mostof the major components, such as the valve body 11, valve seat 12 andthe flush lever 13, in order to incorporate with the automatic flushactuation apparatus 2 of the present invention, so as to minimize thecost of incorporating the conventional manual operated flushing systemwith the automatic flush actuation apparatus 2 of the present invention.

[0063] In addition, the automatic flush actuation apparatus 2 of thepresent invention is capable of incorporating with most conventionalflushing systems to provide the sensor operation of the flushing systemwith or without the flush lever 13 for starting the flushing cycle. Itis worth to mention that the valve member 20 can be embodied as thevalve seat 12 when the automatic flush actuation apparatus 2 of thepresent invention is incorporated with the conventional sensor-operationflushing system.

[0064] One skilled in the art will understand that the embodiment of thepresent invention as shown in the drawings and described above isexemplary only and not intended to be limiting.

[0065] It will thus be seen that the objects of the present inventionhave been fully and effectively accomplished. The above embodiments areshown and described for the purposes of illustrating the functional andstructural principles of the present invention and is subject to changewithout departure from such principles. Therefore, this inventionincludes all modifications encompassed within the spirit and scope ofthe following claims.

What is claimed is:
 1. An automatic flush actuation apparatus for aflushing system which comprises a valve body having a water inlet, awater outlet, and a water chamber communicating between said water inletand said water outlet, a valve seat, having a flush channel, normallysealed with said water chamber for retaining a predetermined waterpressure within said water chamber so as to block water flowing fromsaid water inlet to said water outlet, and a flush lever coupled withsaid valve body, wherein said flush valve comprises: a valve memberadapted for being disposed at said valve seat to control said waterflowing from said water inlet to said water outlet, wherein said valvemember is capable of being moved by said flush lever between amanual-operated closed position and a manual-operated opened position,wherein at said manual-operated closed position, said valve member isarranged for sealedly sitting at said valve seat to block said waterpassing to said water outlet, and at said manual-operated openedposition, said valve member is moved to an opened position for releasingsaid water pressure within said water chamber to allow said water topass from said water inlet to said water outlet through said waterchamber; and a sensor-operated powering assembly, comprising: a housing,which is adapted for mounting on said valve body; a replaceable powersource received in the housing; a CPU electrically connected with saidpower source for sensing a presence of a user of said flushing system,so as to active said power generator; a power generator electricallyconnected to said CPU; a relief valve provided at said valve member forcontrolling said water flowing from said water inlet to said wateroutlet through said water chamber; and an actuator driven by said powergenerator to move said relief valve between an auto-operated closedposition and an auto-operated opened position, wherein at saidauto-operated closed position, said relief valve is sealedly closed forblocking said water passing to said water outlet, and at saidauto-operated opened position, said relief valve is moved to an openedposition by said actuator for releasing said water pressure within saidwater chamber to allow said water passing to said water outlet.
 2. Theautomatic flush actuation apparatus, as recited in claim 1, wherein saidrelief valve has a water passage axially extended along said valvemember for communicating said water chamber with said water outlet, anda valve stopper disposed on said valve member to normally close saidwater passage for controlling said water flowing from said water inletto said water outlet.
 3. The automatic flush actuation apparatus, asrecited in claim 2, wherein said valve member comprises a sealingplatform arranged for sealedly supporting on said valve seat to normallyclose said flush channel, and a valve controlling shaft downwardlyextended from said sealing platform for communicating with said flushlever within said flush channel, wherein said water passage is coaxiallyextended from said sealing platform to a bottom end of said valvecontrolling shaft.
 4. The automatic flush actuation apparatus, asrecited in claim 2, wherein said valve stopper, having a ball-shape,sits on said valve member at an opening of said water passage tonormally close said water passage for retaining said water pressurewithin said water chamber.
 5. The automatic flush actuation apparatus,as recited in claim 3, wherein said valve stopper, having a ball-shape,sits on said valve member at an opening of said water passage tonormally close said water passage for blocking said water passing tosaid water outlet.
 6. The automatic flush actuation apparatus, asrecited in claim 5, wherein said sealing platform has a circularretaining seat protruding upwardly around said opening of said waterpassage, wherein said valve stopper is disposed at said retaining seatso as to hold said valve stopper in position.
 7. The automatic flushactuation apparatus, as recited in claim 4, wherein said actuator has adriving end portion downwardly and rotatably extended from a bottom sideof said housing to contact with said valve stopper, wherein said drivingend portion of the actuator, having a semi-circular cross section, has aflat contacting surface and a curved contacting surface and is arrangedto be driven to rotate via said power generator to move said valvestopper at said auto-operated closed position that said valve stopper iscontacted with said flat contacting surface of said actuator to retainsaid valve stopper at said opening of said water passage for blockingsaid water passing to said water outlet, and to move said valve stopperat said auto-operated opened position that said valve stopper iscontacted with said curved contacting surface of said actuator to movesaid valve stopper to an offset position from said opening of said waterpassage for allowing said water passing to said water outlet.
 8. Theautomatic flush actuation apparatus, as recited in claim 5, wherein saidactuator has a driving end portion downwardly and rotatably extendedfrom a bottom side of said housing to contact with said valve stopper,wherein said driving end portion of the actuator, having a semi-circularcross section, has a flat contacting surface and a curved contactingsurface and is arranged to be driven to rotate via said power generatorto move said valve stopper at said auto-operated closed position thatsaid valve stopper is contacted with said flat contacting surface ofsaid actuator to retain said valve stopper at said opening of said waterpassage for blocking said water passing to said water outlet, and tomove said valve stopper at said auto-operated opened position that saidvalve stopper is contacted w ith said curved contacting surface of saidactuator to move said valve stopper to an offset position from saidopening of said water passage for allowing said water passing to saidwater outlet.
 9. The automatic flush actuation apparatus, as recited inclaim 6, wherein said actuator has a driving end portion downwardly androtatably extended from a bottom side of said housing to contact withsaid valve stopper, wherein said driving end portion of the actuator,having a semi-circular cross section, has a flat contacting surface anda curved contacting surface and is arranged to be driven to rotate viasaid power generator to move said valve stopper at said auto-operatedclosed position that said valve stopper is contacted with said flatcontacting surface of said actuator to retain said valve stopper at saidopening of said water passage for blocking said water passing to saidwater outlet, and to move said valve stopper at said auto-operatedopened position that said valve stopper is contacted with said curvedcontacting surface of said actuator to move said valve stopper to anoffset position from said opening of said water passage for allowingsaid water passing to said water outlet.
 10. The automatic flushactuation apparatus, as recited in claim 4, wherein said housing furthercomprises a locating ring integrally and downwardly protruded from abottom side of said housing to coaxially align with said water passageso as to form as a boundary for said valve stopper to move within saidlocating ring.
 11. The automatic flush actuation apparatus, as recitedin claim 7, wherein said housing further comprises a locating ringintegrally and downwardly protruded from a bottom side of said housingto coaxially align with said water passage so as to form as a boundaryfor said valve stopper to move within said locating ring.
 12. Theautomatic flush actuation apparatus, as recited in claim 9, wherein saidhousing further comprises a locating ring integrally and downwardlyprotruded from a bottom side of said housing to coaxially align withsaid water passage so as to form as a boundary for said valve stopper tomove within said locating ring.
 13. The automatic flush actuationapparatus, as recited in claim 1, wherein said power generator is anelectric motor actuated by said CPU to drive said actuator to rotate.14. The automatic flush actuation apparatus, as recited in claim 5,wherein said power generator is an electric motor actuated by said CPUto drive said actuator to rotate.
 15. The automatic flush actuationapparatus, as recited in claim 12, wherein said power generator is anelectric motor actuated by said CPU to drive said actuator to rotate.16. The automatic flush actuation apparatus, as recited in claim 1,wherein said CPU comprises a control processor supported in said housingand a sensor which is electrically connected to said control processorfor detecting said presence of said user of said flushing system, so asto actuate said power generator through said control processor.
 17. Theautomatic flush actuation apparatus, as recited in claim 5, wherein saidCPU comprises a control processor supported in said housing and a sensorwhich is electrically connected to said control processor for detectingsaid presence of said user of said flushing system, so as to actuatesaid power generator through said control processor.
 18. The automaticflush actuation apparatus, as recited in claim 15, wherein said CPUcomprises a control processor supported in said housing and a sensorwhich is electrically connected to said control processor for detectingsaid presence of said user of said flushing system, so as to actuatesaid power generator through said control processor.
 19. A automaticflush actuation apparatus for a flushing system which comprises a valvebody having a water inlet, a water outlet, and a water chambercommunicating between said water inlet and said water outlet, a valveseat normally sealed with said water chamber for retaining apredetermined water pressure within said water chamber so as to blockwater flowing from said water inlet to said water outlet, wherein saidflush valve comprises: a valve member adapted for being sealedlydisposed on said valve seat; and a sensor-operated powering assembly,comprising: a housing adapted for mounting on said valve body; areplaceable power source received in the housing; a CPU electricallyconnected with said power source for sensing a presence of a user ofsaid flushing system, so as to active said power generator; a powergenerator electrically connected to said CPU; a relief valve provided atsaid valve member for controlling said water flowing from said waterinlet to said water outlet through said water chamber; and an actuatordriven by said power generator to move said relief valve between anauto-operated closed position and an auto-operated opened position,wherein at said auto-operated closed position, said valve stopper issealedly closed for blocking said water passing to said water outlet,and at said auto-operated opened position, said valve stopper is movedto an opened position by said actuator for releasing said water pressurewithin said water chamber to allow said water passing to said wateroutlet.
 20. The automatic flush actuation apparatus, as recited in claim19, wherein said housing comprises a supporting frame having a powersource compartment for receiving said power source therein and a CPUcavity for receiving said CPU therein, and a valve cap which has atransparent window aligned with said CPU and is adapted for mounting onsaid valve body to protectively enclose said supporting frame withinsaid valve cap.
 21. The automatic flush actuation apparatus, as recitedin claim 20, wherein said valve cap comprises an outer casing having apower source opening aligned with said power source compartment toexpose said power source to outside through said power source opening,and a power source cover detachably mounted on said outer casing tocover said power source opening.
 22. The automatic flush actuationapparatus, as recited in claim 21, wherein said outer casing further hasa CPU opening aligned with said CPU cavity to expose said CPU to outsidethrough said CPU opening, wherein said transparent window is detachablymounted on said outer casing to enclose said CPU within said valve cap.23. The automatic flush actuation apparatus, as recited in claim 19,wherein said relief valve has a water passage axially extended alongsaid valve member for communicating said water chamber with said wateroutlet, and a valve stopper disposed on said valve member to normallyclose said water passage for controlling said water flowing from saidwater inlet to said water outlet.
 24. The automatic flush actuationapparatus, as recited in claim 22, wherein said relief valve has a waterpassage axially extended along said valve member for communicating saidwater chamber with said water outlet, and a valve stopper disposed onsaid valve member to normally close said water passage for controllingsaid water flowing from said water inlet to said water outlet
 25. Theautomatic flush actuation apparatus, as recited in claim 23, whereinsaid valve stopper, having a ball-shape, sits on said valve member at anopening of said water passage to normally close said water passage forretaining said water pressure within said water chamber.
 26. Theautomatic flush actuation apparatus, as recited in claim 24, whereinsaid valve stopper, having a ball-shape, sits on said valve member at anopening of said water passage to normally close said water passage forretaining said water pressure within said water chamber.
 27. Theautomatic flush actuation apparatus, as recited in claim 25, whereinsaid actuator has a driving end portion downwardly and rotatablyextended from a bottom side of said housing to contact with said valvestopper, wherein said driving end portion of the actuator, having asemi-circular cross section, has a flat contacting surface and a curvedcontacting surface and is arranged to be driven to rotate via said powergenerator to move said valve stopper at said auto-operated closedposition that said valve stopper is contacted with said flat contactingsurface of said actuator to retain said valve stopper at said opening ofsaid water passage for blocking said water passing to said water outlet,and to move said valve stopper at said auto-operated opened positionthat said valve stopper is contacted with said curved contacting surfaceof said actuator to move said valve stopper to an offset position fromsaid opening of said water passage for allowing said water passing tosaid water outlet.
 28. The automatic flush actuation apparatus, asrecited in claim 26, wherein said actuator has a driving end portiondownwardly and rotatably extended from a bottom side of said housing tocontact with said valve stopper, wherein said driving end portion of theactuator, having a semi-circular cross section, has a flat contactingsurface and a curved contacting surface and is arranged to be driven torotate via said power generator to move said valve stopper at saidauto-operated closed position that said valve stopper is contacted withsaid flat contacting surface of said actuator to retain said valvestopper at said opening of said water passage for blocking said waterpassing to said water outlet, and to move said valve stopper at saidauto-operated opened position that said valve stopper is contacted withsaid curved contacting surface of said actuator to move said valvestopper to an offset position from said opening of said water passagefor allowing said water passing to said water outlet.
 29. The automaticflush actuation apparatus, as recited in claim 26, wherein said housingfurther comprises a locating ring integrally and downwardly protrudedfrom a bottom side of said supporting frame to coaxially align with saidwater passage so as to form as a boundary for said valve stopper to movewithin said locating ring.
 30. The automatic flush actuation apparatus,as recited in claim 28, wherein said housing further comprises alocating ring integrally and downwardly protruded from a bottom side ofsaid supporting frame to coaxially align with said water passage so asto form as a boundary for said valve stopper to move within saidlocating ring.
 31. The automatic flush actuation apparatus, as recitedin claim 19, wherein said power generator is an electric motor actuatedby said CPU to drive said actuator to rotate.
 32. The automatic flushactuation apparatus, as recited in claim 22, wherein said powergenerator is an electric motor actuated by said CPU to drive saidactuator to rotate.
 33. The automatic flush actuation apparatus, asrecited in claim 28, wherein said power generator is an electric motoractuated by said CPU to drive said actuator to rotate.
 34. The automaticflush actuation apparatus, as recited in claim 19, wherein said CPUcomprises a control processor supported in said housing and a sensorwhich is electrically connected to said control processor for detectingsaid presence of said user of said flushing system, so as to actuatesaid power generator through said control processor.
 35. The automaticflush actuation apparatus, as recited in claim 22, wherein said CPUcomprises a control processor supported in said housing and a sensorwhich is electrically connected to said control processor for detectingsaid presence of said user of said flushing system, so as to actuatesaid power generator through said control processor.
 36. The automaticflush actuation apparatus, as recited in claim 28, wherein said CPUcomprises a control processor supported in said housing and a sensorwhich is electrically connected to said control processor for detectingsaid presence of said user of said flushing system, so as to actuatesaid power generator through said control processor.
 37. The automaticflush actuation apparatus, as recited in claim 33, wherein said CPUcomprises a control processor supported in said housing and a sensorwhich is electrically connected to said control processor for detectingsaid presence of said user of said flushing system, so as to actuatesaid power generator through said control processor.